<?php $imgsrc = base_url() . "images/site/";?>
<div class="cabecalho">
    <img class="left" src="<?php echo $imgsrc; ?>txt_info_gerais.gif" alt="Dados dos pesquisadores">
    <a href="cadastro.usuario.php?acao=export" class="right" title="Exportar Dados"><img src="<?php echo $imgsrc; ?>/btn_exportar.gif" alt="Exportar Usu&aacute;rios"
                  onmouseover="this.src='<?php echo $imgsrc; ?>/btn_exportar_over.gif'"
                  onmouseout="this.src='<?php echo $imgsrc; ?>/btn_exportar.gif'" border="0" /></a>

</div>